President´s Message

This letter presents an approach to determining the impact of supplemental reserve and high-MVA-capacity transmission lines on optimal maintenance and repair time. The impact of the supplemental reserve and high-capacity transmission lines is determined by including the availability and costs characteristics. Availability is calculated by taking into account successfully supplied consumer areas, and costs are calculated by taking into account costs of maintenance, repair, and undelivered electric energy. The optimal maintenance and repair time is determined by considering the balance between availability and the costs. The results obtained show that the supplemental reserve and high-capacity transmission lines prolong the maintenance and repair period and reduce the costs.